2260s

Kirk and several of his officers visit the ISS Enterprise. Whilst there, Kirk has a profound effect on Commander Spock. Spock subsequently rises to a position of great power in the Empire and institutes many reforms. Unfortunately this leaves the Empire vulnerable to the Klingon/Cardassian alliance, and it is quickly conquered.4

2370s

Commadner Sisko is kidnapped and taken to the Mirror universe by the Mirror O'Brien to assist the Terran rebellion in recruiting Jennifer Sisko. He succeeds in this mission and returns safely. Whilst in our universe, Mirror O'Brien steals the plans for the USS Defiant.7

Captain Sisko is again brought to the Mirror universe, this time to assist the rebels in completing their copy of the USS Defiant in time to fights off an attempt to recapture the station by Regent Worf.8